Análise do Comportamento Térmico de um Transformador de Potência Através do Uso de Sensoriamento por Fibras Ópticas

Abstract

Power transformers are essential equipments for the proper functioning of the electrical power system. Therefore, there is a need to provide solutions that extend their useful life and monitoring methods to avoid failures and consequently losses to electrical companies. This work presents a series of tests carried out in a prototype transformer built specifically for the purpose of studying the internal thermal behavior, using optical fibers to obtain the direct measurement of the winding temperatures. Thus, analysis of thermal phenomena that occur under different operating conditions are presented, discussing these phenomena from the perspective of temperature rise and loss of life, aiming to reconcile theory with the actual behavior of a transformer, suggesting adequate operating conditions, and also serving as a basis for future thermal studies in power transformers.